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#include "server.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int resolve(const char *host, unsigned short port, struct addrinfo** addr) {
struct addrinfo hints = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_PASSIVE,
};
char port_buf[8];
snprintf(port_buf, sizeof port_buf, "%u", port);
return getaddrinfo(host, port_buf, &hints, addr);
}
int resolve_sa(const char *host, unsigned short port, union sockaddr_union *res) {
struct addrinfo *ainfo = 0;
int ret;
SOCKADDR_UNION_AF(res) = AF_UNSPEC;
if((ret = resolve(host, port, &ainfo))) return ret;
memcpy(res, ainfo->ai_addr, ainfo->ai_addrlen);
freeaddrinfo(ainfo);
return 0;
}
int bindtoip(int fd, union sockaddr_union *bindaddr) {
socklen_t sz = SOCKADDR_UNION_LENGTH(bindaddr);
if(sz)
return bind(fd, (struct sockaddr*) bindaddr, sz);
return 0;
}
int server_waitclient(struct server *server, struct client* client) {
socklen_t clen = sizeof client->addr;
return ((client->fd = accept(server->fd, (void*)&client->addr, &clen)) == -1)*-1;
}
int server_setup(struct server *server, const char* listenip, unsigned short port) {
struct addrinfo *ainfo = 0;
if(resolve(listenip, port, &ainfo)) return -1;
struct addrinfo* p;
int listenfd = -1;
for(p = ainfo; p; p = p->ai_next) {
if((listenfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) < 0)
continue;
int yes = 1;
setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
if(bind(listenfd, p->ai_addr, p->ai_addrlen) < 0) {
close(listenfd);
listenfd = -1;
continue;
}
break;
}
freeaddrinfo(ainfo);
if(listenfd < 0) return -2;
if(listen(listenfd, SOMAXCONN) < 0) {
close(listenfd);
return -3;
}
server->fd = listenfd;
return 0;
}
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